<i>N</i>-Difluoromethylation of Imidazoles and Benzimidazoles Using the Ruppert–Prakash Reagent under Neutral Conditions
作者:G. K. Surya Prakash、Sankarganesh Krishnamoorthy、Somesh K. Ganesh、Aditya Kulkarni、Ralf Haiges、George A. Olah
DOI:10.1021/ol403007j
日期:2014.1.3
using TMS-CF3 (the Ruppert–Prakash reagent) underneutralconditions. Difluoromethylated products were obtained in good-to-excellent yields. Inexpensive, commercially available starting materials, neutralconditions, and shorter reaction times are advantages of this methodology. Reactions are accessible through conventional as well as microwave irradiation conditions.
5-Quinolinecarboxaldehyde was used as a starting synthon to engineer a series of highly luminescent boron complexes based on BODIPY dyes or on original benzimidazole or phenanthroimidazole N^N chelates. For the BODIPY series, the 5-quinoline fragment was either introduced at the meso position of the π-conjugated core via a pyrrolic condensation or at the 3,5 positions through Knoevenagel condensations